Martensen called the pandemic on Jan 26, 2020. The WHO called it March 11.
For the next 6 months he produced videos every weekday analyzing the covid news of the day and relevant published papers, always citing the primary sources. Since then his covid videos have been less frequent, but always data and science oriented.
YouTube immediately demonitized his videos, and may have banned a couple. He uses made-up names for 2 notable off-patent drugs because he claims YT will censor him if he mentions them by name. He has a PhD in pathology from Duke University and has published in Nature. You would think he is qualified to discuss this stuff.